Starbucks wants its stores to put a lid on the latest controversy brewing over their cups.

The coffee giant on Friday reminded outlets that they don't have to write or call out names when a customer orders a cup of joe. The advisory comes after supporters of Donald Trump said employees at a Miami Starbucks refused to write "Trump" on a man's coffee cup after telling them that was his name.

"Over the years, writing customer names on cups and calling out their names has been a fun ritual in our stores. Rarely has it been abused or taken advantage of," Starbucks said in a statement. "We hope and trust that our customers will continue to honor that tradition. We don't require our partners to write or call out names."

A customer later identified as David Sanguesa said he had an argument Thursday with a barista who wouldn't write "Trump" on his cup, and resorted calling the action anti-white "discrimination." The incident was shared on social media, and picked up by Twitter user Baked Alaska, who encouraged the hashtag #TrumpCup.

This isn't the first Starbucks controversy with Trump supporters. In November, some of them admonished the company for their new green cups meant to promote unity, saying it was a "liberal bias" and "political brainwashing."

The coffee chain also received backlash last December after releasing red cups devoid of Christmas imagery.